Electrical fluid-heater.



F. KUHN.

ELECTRICAL FLUID HEATER.

APPLICATION PILBD SEPT. 8,1913.

L1 19,840, Patented Dec. 8, 1914.

Unirse sfrafriis migas-'r ermee.

FRANK KUHN, or DETROIT, MICHIGAN.

ELECTRICAL FLUIDv-VHEATEB.

Application led September 8, 1913.

l'a all whomit may concern Y Be it known that I, FRANK KUHN, a citizen of the United States of America, residing at Detroit, in the count-y of I'Vayne and State of Michigan, have invented certain new and useful Improvements in Electrical Fluid-Heaters, of which the following is a specification, reference being had therein to the accompanying drawings.'

The invention relates to electrical heaters particularly designed for heating fluids` such as gases or liquids, and being particularly adapted for ilse in connection with carbureters.

In the drawings: Figure 1 is a longitudinal section through one. construction of heater; Fig. 2 is a similarvvieu" showing a modified construction'. k/

My improved heater comprises essentii ly a tubular casing or conduitfafhichA iSv/lined with insul-.iting material, preferably a series of insulator bushings placed end/to end. Within these bushings is arranged a coil forming the resistor element, the terminals being carried out through the ends of the metal casing. There is also provided inlet and outlet connections for Athe fluid at opposite ends of the casing and by means of which said liuidv is caused to flow-through the resistor coil to be heated thereby.

In detail, A is a'lmetal tube, preferably threaded at its opposite ends for engagement with the nipples B of fittings C. These fittings are provided with laterally-extending n les I) forming the inletor outlet conduits,.andf`their ends are stopped by plugs ivo E, wPcliare centrally provided with insulator bushings F for the passage of the electrical terminals, Preferably the meniber C is a T-tting and is internally threaded through its head portion so as to receive at the opposite ends thereof the tube A and the plug E. Adjacent to this plug is an insulator, preferably a mica washer G, which is secured in position by a ring nut- H, and adjacent 'to the latter is a packing material I clamped by a ring nut .I and an interposed mica-Washer K, the construction being such as to form both an insulated and Specification of Letters atent.

APai'eiitecl Dec. 8, 1911i.

serial uo. 788,712.

liquid tight seal between the plug and the chamber within thel tube.

The lining for the tube A is formed by a serie-s of insulatoiluishings L which are placed end to end and forni a continuous tube. A'

M is the resistor coil placed within the' ples D, and during such passage will come in contact with the resistor coil. .-Xs this coil is supported at al'l timesby the inf sulator bushings, ali danger of short circuit1 is: avoided.

In the modified construction shown in I" ig. 2, the saine arrangement of 'metallic casing vith a series of. insulator bushings and resistor therein is used, but the casing is then inclosed inv an outer casing O. The space bet-Ween the inner and outer casing may be used Yeither for heat i nsulation, or for the simultaneous heat-ing` of air on the outside of the inner casing and for heating of liquid in the interior thereof.

\Vhat I claim as my invention is: .Y

1. The combination with a tubular casing ofv T-fttings at oppositeends thereof providing latcra`lly-extending vfluid .iniet and outlet connections, a series of insulator bushings within said casing. a coiled resistor u'ithin said bushings and haring terniinais extending out through the ends of the -'ttings, and insulator and liquid tight plugs 'in the ends of said Tis surroumling said. terminals.

2. The combination u'ith a tubular casing of an insulator bushing therein. a coiled resistor within said insulator bushing. a T- fitting at the end of said casing having stem forming a lat-eral fluid connection and its head being internally threadta to receive a plug, a terminal for said re.. .i

ing rings comprising a ring nut, an insir lator washer and packingmatcriai.

passing ,t .through said plug. and insulator and pack- The combination with a tubular casing, off an insulator bushing arranged therein, a ressor coil Within Said bushing extending ihrough said casing, a tt'mg at the end of said. casing having an insulated outlet for said resistor can and a fiuid inlet, a second tubulin casing surrounding said first-menoned casing, and meanstbetween said casings for rovding heat-insulation for the rst-mentloned casing.

In testimony whereof I afix my signature in presence of two witnesses.

FRANK KUHN. @Vitnesses:

WM. J. BELKNAP, JAMES P. BARRY. 

